拔牙的适应证包括()

A．晚期牙周病患牙已松动皿度

B．乳牙滞留影响恒牙萌出

C．上颌中切牙间锥形多生牙

D．恶性肿瘤放疗区患牙，在放射治疗后1年内

E．反复引起冠周炎的阻生牙

It is required by the authorities of school that students should be treated ______ by their teachers but how can a teacher respect them when the students show no respect for him?     [ ]

A. in respect  

B. with respect  

C. for respect  

D. by respect